Re: [Gretl-devel] bandwidth default for nadarwat()

On Wed, 13 Jun 2018, Sven Schreiber wrote: > I don't see why we need to rename and deprecate the nadarwat function > to achieve what you want. In the old version the user always has to > give y, x and h (bandwidth). Plus in the background there is the > nadarwat_trim setting (default 4). > > So if we extend the function as you say, then only two things need to > be done internally if the function is called with only the first > three args: > 1) Check whether bandwidth is negative. If so, set leave_one_out to 1 > and bandwidth to abs(bandwidth). > 2) Check whether the nadarwat_trim value is != 4. If so, set the trim > arg to that value. My concern is: how do you get automatic bandwidth selection and the leave-one-out option together? I guess that, in your scheme, you could leave the third argument empty and set the fourth one to 1, but it looks sort of awkward to me. Anyway, it's a possibility.